This document discusses the security implications of native IPv6 support and IPv6 transition/co-existence technologies on “IPv4-only” networks, and describes possible mitigations for the aforementioned issues.
You can download it from the following link: https://packetstormsecurity.com/files/download/119657/draft-ietf-opsec-ipv6-implications-on-ipv4-nets-02.txt
Source: https://packetstormsecurity.com/files/119657/Security-Implications-Of-IPv6-On-IPv4-Networks-Revision-02.html